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Re: Locking bmap mappings

To: "Andi Kleen" <ak@xxxxxxx>
Subject: Re: Locking bmap mappings
From: Steve Lord <lord@xxxxxxx>
Date: Tue, 29 Aug 2000 09:41:18 -0500
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: Message from "Andi Kleen" <ak@xxxxxxx> of "Tue, 29 Aug 2000 00:36:59 +0200." <20000829003659.A16062@xxxxxxxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
> On Mon, Aug 28, 2000 at 04:23:32PM -0500, Steve Lord wrote:
> > 
> > > 
> > > Sorry, I should have been more clear. The locking is required for externa
l
> > > users, e.g. the loop device (the current version doesn't do it, but it wi
ll
> > > be fixed to do so). loop device cannot access any internal XFS locks. 
> > > 
> > > 
> > > -Andi
> > 
> > OK, that's a different kettle of fish....
> 
> It would be nice if you could commit (or whatever ptools calls that) it. 
> 
> Thanks,
> 
> -Andi


Actually, things are somewhat more broken that this, XFS does not provide
prepare_write or commit_write address space operations, so I presume this
means under loopback we would be at best a readonly device. At worst
totally non-functional.

Steve








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